wehub-resource-sync
61 lines
2.5 KiB
Markdown
61 lines
2.5 KiB
Markdown
# MultilevelCropAndResize [DEPRECATED]
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**This plugin is deprecated since TensorRT 10.12 and will be removed in a future release. Note alternatives are planned to be provided.**
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**Table Of Contents**
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- [Description](#description)
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* [Structure](#structure)
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- [Parameters](#parameters)
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- [Additional resources](#additional-resources)
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- [License](#license)
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- [Changelog](#changelog)
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- [Known issues](#known-issues)
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## Description
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The `MultilevelCropAndResize` plugin performs the ROIAlign operation on the output feature maps from FPN (Feature Pyramid Network). It is used for MaskRCNN inference in Transfer Learning Toolkit.
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### Structure
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This plugin supports the NCHW format. It takes 6 inputs in the following order: `roi`, and 5 `feature_maps` from FPN (Note: 5 `feature_maps` are required for this plugin and will not function properly with a lesser number of `feature_maps`).
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`roi` is the ROI candidates from the `MultilevelProposeROI` plugin. Its shape is `[N, rois, 4]` where `N` is the batch_size, `rois` is the number of ROI candidates and `4` is the number of coordinates.
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`feature_maps` are the output of FPN. In TLT MaskRCNN, the model we provide contains 5 feature maps from FPN's different stages.
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This plugin generates one output tensor of shape `[N, rois, C, pooled_size, pooled_size]` where `C` is the channel of mutiple feature maps from FPN and `pooled_size` is the height(and width) of the feature area after ROIAlign.
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## Parameters
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This plugin has the plugin creator class `MultilevelCropAndResizePluginCreator` and the plugin class `MultilevelCropAndResize`.
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The following parameters were used to create `MultilevelCropAndResize` instance:
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| Type | Parameter | Description
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|------------------|---------------------------------|--------------------------------------------------------
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|`int` |`pooled_size` | The spatial size of a feature area after ROIAlgin will be `[pooled_size, pooled_size]`
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|`int[3]` |`image_size` | The size of the input image in CHW. Defaults to [3, 832, 1344]
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## Additional resources
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## License
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For terms and conditions for use, reproduction, and distribution, see the [TensorRT Software License Agreement](https://docs.nvidia.com/deeplearning/sdk/tensorrt-sla/index.html)
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documentation.
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## Changelog
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May 2025: Add deprecation note.
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March 2022: This is the second release of this `README.md` file.
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June 2020: First release of this `README.md` file.
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## Known issues
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There are no known issues in this plugin.
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